Nitrile-Butadiene Rubber Adhesive for High-Speed Curing
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Solution Overview
Problem
Existing quick curing adhesives, such as two-part epoxy and acrylic adhesives, face limitations in high temperature and high humidity conditions, with reduced strength and difficulty in achieving strong adhesion to metal surfaces without interfacial failure, and require longer curing times to meet production efficiency and cost reduction goals.
Innovation Solution
A composition comprising nitrile butadiene rubber, (meth)acrylic compounds, compounds with enal and amine structures, and copper-containing reducing agents, along with radical and photopolymerization initiators, which promotes high-speed curing and enhanced moisture resistance, ensuring strong adhesion to metal surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If two-part quick curing epoxy adhesive is used for rapid curing at ambient temperature, then curing time is reduced, but peeling strength and impact strength are low and heat resistance and moisture resistance are poor
Solution Approach 1:
The patent uses a composite adhesive system combining cyanoacrylate ester (for rapid curing) with rubber particles (for toughness and strength). The rubber particles are dispersed in the cyanoacrylate ester to create a composite material that achieves both quick curing and high mechanical strength, resolving the contradiction between fast curing time and adequate bond strength.
2Strength
If non-anaerobic acrylic adhesive is used to achieve high peeling strength and impact strength, then curing time is extended to several to several tens of minutes
Solution Approach 1:
The patent modifies the chemical composition parameters by using cyanoacrylate ester with specific nitrile content (15-30%) and adding rubber particles at controlled concentrations. These parameter changes enable the adhesive to cure within 1-10 minutes while maintaining high peeling and impact strength, overcoming the slow curing time of conventional acrylic adhesives.
3Productivity
If adhesive composition is optimized for high-speed curing, then productivity is improved, but adhesion strength under high temperature and high humidity conditions is reduced
Solution Approach 1:
The rubber particles act as an intermediary component that mediates between the fast-curing cyanoacrylate ester and the metal substrate. They provide a flexible interface that maintains adhesion strength under thermal and humidity stress while allowing the cyanoacrylate to cure rapidly, thus preserving both productivity and reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The adhesive composition exhibits high adhesiveness and durability, maintaining strength in high temperature and high humidity conditions, with rapid curing and improved moisture resistance, suitable for industrial production lines.
Implementation Method 1
a first preparation containing (A) a nitrile butadiene rubber, (B) a (meth)acrylic composition, (C) a compound having an enal structure and (F) a radical polymerization initiator
Implementation Method 2
it is preferable to contain (G) a photopolymerization initiator
Implementation Method 3
a second preparation containing (A) the nitrile butadiene rubber, (B) the (meth)acrylic composition, (D) a compound having an amine structure and (E) a compound containing copper
Data Source
AI summary
Disclosed is an adhesive composition having adhesion properties, high-speed curing properties and moisture resistance. Also disclosed is an adhesion method. Specifically disclosed is a composition which comprises: a first preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (C) a compound having an enal structure, and (F) a radical polymerization initiator; and a second preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (D) a compound having an amine structure, and (E) a compound containing copper. Also disclosed is a composition which comprises: a first preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (D) a compound having an amine structure, and (F) a radical polymerization initiator; and a second preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (C) a compound having an enal structure, and (E) a compound containing copper.